B21

Favorite Datasheet

#B21

Description

B21 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: B21

Category	Type	Steel Grade
Steel Grades	Carbon Steel	B21
		A485 Grade2
		A485 Grade3
		A485 Grade4
		52100
		5195
		K19526
		1070M
		5160
		B20
		20Cr3

Chemical composition(mass fraction)(wt.%) of the B21

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.17-0.23	0.4	0.6-0.9	0.025	0.015	0.9-1.2
Mo	Al	Cu	Nb	Ti	V	Ce
	0.05	0.3		+
N	O2	Pb	B	Other
	0.002

Mechanical Properties of steel grade B21

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
733 (≥)	494 (≥)	22	41	11	Solution and Aging, Annealing, Ausaging, Q+T,etc	443

Physical Properties of steel grade B21

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
31	-	-			0.13	-
141	121	-	43.3	114		-
584	-	42	32.2			132	424

Heat Treatment of steel grade B21

Heat treated : 1173°C - 1399°C

Technological Curves of steel grade B21

No Curve

Cross Reference Table (Equivalent Grade) of B21

Grade	Standard	Country	Application
Z12CKNDWNb21-20-20	AFNOR	France	The vent valve steel
Z12CKNDWNb21-20-20	AFNOR	France	Steel Exhaust Valves
Z50CMNNb21-09-02Az	AFNOR	France	Steel Exhaust Valves
Z53CMNNb21-09-02Az	AFNOR	France	Steel Exhaust Valves
Z60CMDVNb21-10Az	AFNOR	France	Steel Exhaust Valves
SNB21-1-5		China	China Taiwan Structural steel

Available Suppliers

Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

Rfq.: sales@longhaisteel.com

Do you supply this B21?
List your company on S&G now? Join
Non-paying users only

Stainless Steels

Tube/Pipe

Steel Profiles

Cold rolled/hot rolled

Wire rod

Quality special steel

Superalloy & High Temperature Alloy

B21